Proj. explorer: Adjust order of load/unload signals

This tries to fix inconsistencies concerning the order of some signals
and the corresponding state of the sessions. In particular, it now emittes
aboutToLoadSession *after* aboutToUnloadSession. Also, retrieving the
active session name gives the correct result when updating project files.
In addition, there's a new parameter to aboutToLoadSession which describes
the session being loaded.

Change-Id: Iab5fb21080a7ee9bbf9f4d8958499cbc5549e81e
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/plugins/projectexplorer/session.cpp

@@ -554,6 +554,9 @@ bool SessionManager::createImpl(const QString &fileName)
         emit aboutToUnloadSession();
         delete m_file;
         m_file = new SessionFile;
+        const QString &sessionName = sessionNameFromFileName(fileName);
+        emit aboutToLoadSession(sessionName);
+        updateName(sessionName);
         m_file->setFileName(fileName);
         setStartupProject(0);
 
@@ -561,6 +564,8 @@ bool SessionManager::createImpl(const QString &fileName)
             ModeManager::instance()->activateMode(Core::Constants::MODE_EDIT);
             ModeManager::instance()->setFocusToCurrentMode();
         }
+
+        emit sessionLoaded();
     }
 
     m_virginSession = true;
@@ -594,6 +599,9 @@ bool SessionManager::loadImpl(const QString &fileName)
         emit aboutToUnloadSession();
         delete m_file;
         m_file = new SessionFile;
+        const QString &sessionName = sessionNameFromFileName(fileName);
+        emit aboutToLoadSession(sessionName);
+        updateName(sessionName);
         if (!m_file->load(fileName)) {
             QMessageBox::warning(0, tr("Error while restoring session"),
                                     tr("Could not restore session %1").arg(fileName));
@@ -631,6 +639,8 @@ bool SessionManager::loadImpl(const QString &fileName)
 
         ModeManager::instance()->activateMode(modeIdentifier);
         ModeManager::instance()->setFocusToCurrentMode();
+
+        emit sessionLoaded();
     }
 
     if (debug)
@@ -972,16 +982,20 @@ QString SessionManager::sessionNameToFileName(const QString &session) const
     return m_core->userResourcePath() + '/' + session + ".qws";
 }
 
+QString SessionManager::sessionNameFromFileName(const QString &fileName) const
+{
+    const int slash = fileName.lastIndexOf('/');
+    Q_ASSERT(slash != -1 && fileName.endsWith(".qws"));
+    return fileName.mid(slash + 1, fileName.length() - slash - 5); // Exclude .qws
+}
+
 /*!
     \brief Creates a new default session and switches to it.
 */
 
 void SessionManager::createAndLoadNewDefaultSession()
 {
-    emit aboutToLoadSession();
-    updateName("default");
-    createImpl(sessionNameToFileName(m_sessionName));
-    emit sessionLoaded();
+    createImpl(sessionNameToFileName("default"));
 }
 
 /*!
@@ -1050,23 +1064,13 @@ bool SessionManager::loadSession(const QString &session)
 
     if (!sessions().contains(session))
         return false;
-    emit aboutToLoadSession();
+
     QString fileName = sessionNameToFileName(session);
-    if (QFileInfo(fileName).exists()) {
-        if (loadImpl(fileName)) {
-            updateName(session);
-            emit sessionLoaded();
-            return true;
-        }
-    } else {
-        // Create a new session with that name
-        if (!createImpl(sessionNameToFileName(session)))
-            return false;
-        updateName(session);
-        emit sessionLoaded();
-        return true;
-    }
-    return false;
+    if (QFileInfo(fileName).exists())
+        return loadImpl(fileName);
+
+    // Create a new session with that name
+    return createImpl(sessionNameToFileName(session));
 }
 
 QString SessionManager::lastSession() const